28320261038121 has 8 divisors (see below), whose sum is σ = 40664990208640. Its totient is φ = 17427852946512.

The previous prime is 28320261038089. The next prime is 28320261038149. The reversal of 28320261038121 is 12183016202382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28320261038121 - 2⁵ = 28320261038089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 726160539439 = 28320261038121 / (2 + 8 + 3 + 2 + 0 + 2 + 6 + 1 + 0 + 3 + 8 + 1 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28320261038121.

It is not an unprimeable number, because it can be changed into a prime (28320261030121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363080269681 + ... + 363080269758.

It is an arithmetic number, because the mean of its divisors is an integer number (5083123776080).

Almost surely, 2^{28320261038121} is an apocalyptic number.

It is an amenable number.

28320261038121 is a deficient number, since it is larger than the sum of its proper divisors (12344729170519).

28320261038121 is a wasteful number, since it uses less digits than its factorization.

28320261038121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726160539455.

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 28320261038121 in words is "twenty-eight trillion, three hundred twenty billion, two hundred sixty-one million, thirty-eight thousand, one hundred twenty-one".